package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;


@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {

        boolean bucketExists = minioClient.
                bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName())
                        .build());
        //判断bucket是否存在,不存在创建出来
        if (!bucketExists) {
            minioClient.makeBucket(MakeBucketArgs.builder()
                    .bucket(minioProperties.getBucketName())
                    .build());

            //配置buckName的访问权限
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().
                    bucket(minioProperties.getBucketName())
                    .config(createBucketPolicyConfig(minioProperties.getBucketName()))
                    .build());
        }
        //设置文件名  = 日期 / 随机唯一ID(UUID) - 文件的原始文件名
        String filename = new SimpleDateFormat("yyyyMMdd").
                format(new Date()) + "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();

        //上传文件 putObject  (upload只能用于本地磁盘上传)
        minioClient.putObject(PutObjectArgs.builder().
                bucket(minioProperties.getBucketName())
                .stream(file.getInputStream(), file.getSize(), -1)
                .object(filename)
                .contentType(file.getContentType())//设置文件类型(因为浏览器会默认显示jpg类型,其他类型无法展示)
                .build());
        //拼接url
        String url = minioProperties.getEndPoint() + "/" + minioProperties.getBucketName() + "/" + filename;
        return url;

    }


    //编写bucketName的权限

    private String createBucketPolicyConfig(String bucketName) {

        return """
                {
                  "Statement" : [ {
                    "Action" : "s3:GetObject",
                    "Effect" : "Allow",
                    "Principal" : "*",
                    "Resource" : "arn:aws:s3:::%s/*"
                  } ],
                  "Version" : "2012-10-17"
                }
                """.formatted(bucketName);
    }
}
